paṣāṣu - to break (?) (CAD P 226, AHw. 840)

Probably to be compared with WS *pṣ̂ṣ̂ ‘to split, to break’.
As an alternative, Arb. fṣṣ ‘to separate, to remove, to displace’ can be considered. Cf. also Nab. pṣṣ ‘to be divided’, an Arabism according to DNWSI 931.